/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-dark: #0B192C;
      --accent: #FF6B35;
      --teal: #00A896;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 0%, rgba(15, 82, 186, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 12px 30px -4px rgba(15, 82, 186, 0.12);
    }
    details summary::-webkit-details-marker {
      display: none;
    }